Preprints
https://doi.org/10.5194/egusphere-2022-153
https://doi.org/10.5194/egusphere-2022-153
 
11 May 2022
11 May 2022

How 3d volcanic stratigraphy constrains headscarp collapse scenarios: the Samperre Cliff case study (Martinique Island, Lesser Antilles)

Marc Peruzzetto1, Yoann Legendre1, Aude Nachbaur2, Thomas J. B. Dewez1, Yannick Thiery1, Clara Levy1, and Benoit Vittecoq2 Marc Peruzzetto et al.
  • 1BRGM, F-45060 Orléans, France
  • 2BRGM Martinique, 97200 Fort-de-France, Martinique

Abstract. Gravitational instabilities can be significant threats to populations and infrastructures. For hazard assessment, it is of prior importance to estimate the geometry and volume of potential unstable masses. This characterization can be particularly difficult in volcanic context due to the succession of deposition and erosion phases. Indeed, it results in complex layering geometries where the interfaces between geological layers may be neither parallel nor planar. Geometry characterization is all the more complex when unstable masses are located in steep and hardly accessible landscapes, which limits data acquisition. In this work, we show how remote observations can be used to estimate the surface envelope of an unstable mass on a volcanic cliff. We use ortho-photographs, aerial views and topographic surveys to (i) describe the different geological units of the cliff, (ii) identify stable and unstable units, (iii) infer the paleo-morphology of the site and (iv) estimate potential unstable volumes. We use the Samperre cliff in Martinique (Lesser Antilles, French West Indies) as a study site, where recurrent destabilizations since at least 1988 have produced debris flows that threaten populations and infrastructures. Our analysis suggests that the destabilizations occurring on the cliff may be associated to the re opening of a paleo-valley filled by pyroclastic materials. We estimate that between 3.5 × 106 m3 and 8.3 × 106 m3 could still be mobilized by future destabilizations in the coming decades.

Journal article(s) based on this preprint

12 Dec 2022
How volcanic stratigraphy constrains headscarp collapse scenarios: the Samperre cliff case study (Martinique island, Lesser Antilles)
Marc Peruzzetto, Yoann Legendre, Aude Nachbaur, Thomas J. B. Dewez, Yannick Thiery, Clara Levy, and Benoit Vittecoq
Nat. Hazards Earth Syst. Sci., 22, 3973–3992, https://doi.org/10.5194/nhess-22-3973-2022,https://doi.org/10.5194/nhess-22-3973-2022, 2022
Short summary

Marc Peruzzetto et al.

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-153', Federico Di Traglia, 06 Jun 2022
    • AC1: 'Reply on RC1', Marc Peruzzetto, 24 Aug 2022
  • RC2: 'Comment on egusphere-2022-153', Anonymous Referee #2, 28 Jun 2022
    • AC2: 'Reply on RC2', Marc Peruzzetto, 24 Aug 2022
  • RC3: 'Comment on egusphere-2022-153', Georges Boudon, 08 Jul 2022
    • AC3: 'Reply on RC3', Marc Peruzzetto, 24 Aug 2022

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-153', Federico Di Traglia, 06 Jun 2022
    • AC1: 'Reply on RC1', Marc Peruzzetto, 24 Aug 2022
  • RC2: 'Comment on egusphere-2022-153', Anonymous Referee #2, 28 Jun 2022
    • AC2: 'Reply on RC2', Marc Peruzzetto, 24 Aug 2022
  • RC3: 'Comment on egusphere-2022-153', Georges Boudon, 08 Jul 2022
    • AC3: 'Reply on RC3', Marc Peruzzetto, 24 Aug 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (further review by editor and referees) (15 Sep 2022) by Rachid Omira
AR by Marc Peruzzetto on behalf of the Authors (24 Oct 2022)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (15 Nov 2022) by Rachid Omira
RR by Anonymous Referee #1 (15 Nov 2022)
ED: Publish as is (15 Nov 2022) by Rachid Omira
AR by Marc Peruzzetto on behalf of the Authors (15 Nov 2022)  Author's response    Manuscript

Journal article(s) based on this preprint

12 Dec 2022
How volcanic stratigraphy constrains headscarp collapse scenarios: the Samperre cliff case study (Martinique island, Lesser Antilles)
Marc Peruzzetto, Yoann Legendre, Aude Nachbaur, Thomas J. B. Dewez, Yannick Thiery, Clara Levy, and Benoit Vittecoq
Nat. Hazards Earth Syst. Sci., 22, 3973–3992, https://doi.org/10.5194/nhess-22-3973-2022,https://doi.org/10.5194/nhess-22-3973-2022, 2022
Short summary

Marc Peruzzetto et al.

Marc Peruzzetto et al.

Viewed

Total article views: 425 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
307 104 14 425 5 6
  • HTML: 307
  • PDF: 104
  • XML: 14
  • Total: 425
  • BibTeX: 5
  • EndNote: 6
Views and downloads (calculated since 11 May 2022)
Cumulative views and downloads (calculated since 11 May 2022)

Viewed (geographical distribution)

Total article views: 374 (including HTML, PDF, and XML) Thereof 374 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 12 Dec 2022
Download

The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
Volcanic edifices result from successive construction and dismantling phases. Thus, the geological units forming the volcano display complex geometries. We show that such geometries can be reconstructed thanks to aerial views, topographic surveys and photogrammetric models. In our case study of the Samperre Cliff (Martinique, Lesser Antilles), it allows to link destabilizations from a rocky cliff to the existence of a filled paleo valley, and estimate a potentially unstable volume.